On January 3, 2017, an earthquake measuring \(M_{w}\) 5.7 struck 19 km east of Ambassa in Tripura, India, leading to soil liquefaction, lateral spreading, and landslides in the epicentral area. This paper presents the results of comprehensive field investigations of liquefied soil sites following the 2017 Tripura earthquake. The study involved conducting Standard Penetration Test (SPT) and Multichannel Analysis of Surface Wave (MASW) tests to evaluate the penetration resistance and shear wave velocity ( \(V_{s}\) ) profile of the sites. These data were subsequently utilized to determine the liquefaction potential index (LPI). Results from the field tests revealed low SPT N, low \(V_{s}\) , and high LPI values at shallow depth, indicating the presence of thick and loose soil layers at the site. This study is particularly valuable to the earthquake engineering community, as there are limited available case histories documenting in-situ soil properties at liquefaction sites triggered by earthquakes below magnitude 6.
